Happiness does not lie in amusement; it would be strange if one were to take trouble and suffer hardship all one's life in order to amuse oneself

The happy life is thought to be one of excellence; now an excellent life requires exertion, and does not consist in amusement.

...happiness does not consist in amusement. In fact, it would be strange if our end were amusement, and if we were to labor and suffer hardships all our life long merely to amuse ourselves.... The happy life is regarded as a life in conformity with virtue. It is a life which involves effort and is not spent in amusement....

Happiness is the meaning and the purpose of life, the whole aim and end of human existence.

Being happy doesn't mean that everything is perfect. It means that you've decided to look beyond the imperfections.

To live happily is an inward power of the soul. -Aristotle.